Nuclear form factors in the timelike region and photoproduction of pions in nuclei

Journal Article · Thu Apr 01 00:00:00 EST 1982 · Phys. Rev. C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.25.1986· OSTI ID:5162873

Bosco, B; Kim, C W; Mintz, S L

The requirement of gauge invariance is applied to the matrix element for pion-photoproduction near threshold for spin 1/2/sup + -/..-->..1/2/sup + -/ and 0/sup + -/bold-arrow-left-right1/sup + -/ transitions and leads to relations between F/sub A/(..mu../sup 2/) and F/sub A/(-..mu../sup 2/), and to relations. These relations lead to theoretical predictions for cross sections consistent with experiment within the level of approximations made. Straightforward analytic continuation of the axial-vector form factor to the timelike region is also examined.

• Research Organization: Istituto di Fisica Teorica, Universita di Firenze, Firenze, Italy
• OSTI ID: 5162873
• Journal Information: Phys. Rev. C; (United States), Vol. 25:4
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
CARBON 12 TARGET
PHOTONUCLEAR REACTIONS
LITHIUM 6 TARGET
PHOTOPRODUCTION
PIONS PLUS
BORON 12
CROSS SECTIONS
ENERGY-LEVEL TRANSITIONS
FORM FACTORS
GAUGE INVARIANCE
HELIUM 6
MATRIX ELEMENTS
PCAC THEORY
SPIN
ANGULAR MOMENTUM
BASIC INTERACTIONS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BORON ISOTOPES
BOSONS
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
EVEN-EVEN NUCLEI
HADRONS
HELIUM ISOTOPES
INTERACTIONS
INVARIANCE PRINCIPLES
ISOTOPES
LIGHT NUCLEI
MESONS
NUCLEAR REACTIONS
NUCLEI
ODD-ODD NUCLEI
PARTICLE PRODUCTION
PARTICLE PROPERTIES
PIONS
PSEUDOSCALAR MESONS
RADIOISOTOPES
SECONDS LIVING RADIOISOTOPES
TARGETS
651315* - Nuclear Properties & Reactions
A=6-19
Theoretical- Nuclear Reactions & Scattering- (-1987)